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Fortnightly vs. Biweekly: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Updated on December 25, 2023
Fortnightly means occurring every two weeks, while biweekly can mean either twice a week or every two weeks.
Fortnightly vs. Biweekly

Key Differences

Fortnightly specifically refers to something happening every two weeks. Biweekly can be ambiguous, meaning either twice a week or every two weeks.
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Nov 17, 2023
Fortnightly is a term more commonly used in British English to denote a two-week interval. Biweekly is often used in American English and can require context to determine the exact frequency.
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Nov 17, 2023
The term "fortnightly" comes from the Old English 'fēowertyne niht,' meaning fourteen nights. "Biweekly" originates from the prefix 'bi-', meaning two or twice, but its usage can be confusing.
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Fortnightly schedules are clear and unambiguous, strictly meaning once every two weeks. Biweekly schedules may need clarification, as they can be interpreted as twice a week or every two weeks.
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Fortnightly is often used for regular events, such as meetings or publications, occurring every two weeks. Biweekly might be used for payroll, meetings, or publications but can require additional clarification to avoid confusion.
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Comparison Chart

Frequency Definition

Every two weeks
Either twice a week or every two weeks
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Nov 17, 2023

Common Usage

More prevalent in British English
More common in American English
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Nov 17, 2023

Etymology

From Old English, meaning 'fourteen nights'
From Latin prefix 'bi-', meaning two or twice
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Clarity of Term

Unambiguous frequency
Can be ambiguous without context
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Nov 17, 2023

Typical Applications

Regular events like meetings, magazines
Payroll, meetings, but often needs clarification
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Fortnightly and Biweekly Definitions

Fortnightly

Pertaining to something happening every two weeks.
They opted for a fortnightly subscription plan.
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Nov 17, 2023

Biweekly

Occurring every two weeks or twice a week.
The staff meetings are held biweekly.
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Shumaila Saeed
Nov 17, 2023

Fortnightly

Happening every fourteen days.
We have a fortnightly team meeting.
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Nov 17, 2023

Biweekly

Used to describe events occurring twice in a week or every other week.
The biweekly appointment was scheduled for every other Tuesday.
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Nov 17, 2023

Fortnightly

Happening or appearing once in or every two weeks.
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Oct 19, 2023
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Biweekly

Pertaining to something happening with a frequency of twice per week or once every two weeks.
Their biweekly meetings were essential for team coordination.
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Nov 17, 2023

Fortnightly

Once in a fortnight.
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Oct 19, 2023

Biweekly

Happening twice a week or every fourteen days.
She attends biweekly yoga classes.
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Nov 17, 2023

Fortnightly

A publication issued once every two weeks.
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Oct 19, 2023

Biweekly

A term that can mean both semi-weekly and semi-monthly.
The newsletter is sent out biweekly.
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Nov 17, 2023

Fortnightly

A publication issued fortnightly (once every two weeks).
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Oct 19, 2023

Biweekly

Happening every two weeks.
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Oct 19, 2023

Fortnightly

Occurring once in a fortnight; once every two weeks
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Oct 19, 2023

Biweekly

Happening twice a week; semiweekly.
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Oct 19, 2023

Fortnightly

Once in a fortnight; once every two weeks
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Oct 19, 2023

Biweekly

A publication issued every two weeks.
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Oct 19, 2023

Fortnightly

Occurring or appearing once in a fortnight; as, a fortnightly meeting of a club; a fortnightly magazine, or other publication.
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Oct 19, 2023

Biweekly

Every two weeks.
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Oct 19, 2023

Fortnightly

Occurring every two weeks
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Shumaila Saeed
Oct 19, 2023

Biweekly

Twice a week; semiweekly. See Usage Note at bi-1.
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Oct 19, 2023

Fortnightly

Every two weeks;
He visited his cousins fortnightly
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Oct 19, 2023

Biweekly

Occurring once every two weeks; fortnightly.
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Shumaila Saeed
Oct 19, 2023

Fortnightly

Occurring or published once every two weeks.
The magazine is issued fortnightly.
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Shumaila Saeed
Nov 17, 2023

Biweekly

Occurring twice a week (but see the Usage notes).
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Oct 19, 2023

Fortnightly

A term used to describe an event that occurs once every two weeks.
The cleanup drive is organized on a fortnightly basis.
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Nov 17, 2023

Biweekly

Every two weeks.
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Oct 19, 2023

Fortnightly

Describing an interval or period of two weeks.
The project updates are scheduled fortnightly.
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Shumaila Saeed
Nov 17, 2023

Biweekly

Twice a week (but see the Usage notes).
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Oct 19, 2023

Biweekly

Something that is published or released once every two weeks.
The local paper is a biweekly.
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Shumaila Saeed
Oct 19, 2023

Biweekly

Occurring or appearing once every two weeks; fortnightly.
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Shumaila Saeed
Oct 19, 2023

Biweekly

A periodical that is published biweekly
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Oct 19, 2023

Biweekly

Occurring twice a week
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Oct 19, 2023

Biweekly

Occurring every two weeks
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Oct 19, 2023

Biweekly

Twice a week;
He called home semiweekly
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Shumaila Saeed
Oct 19, 2023

Biweekly

Every two weeks;
He visited his cousins fortnightly
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Shumaila Saeed
Oct 19, 2023

Repeatedly Asked Queries

How is biweekly defined?

It can mean either twice a week or every two weeks.
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Shumaila Saeed
Nov 17, 2023

Can biweekly cause confusion?

Yes, due to its dual meaning.
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Nov 17, 2023

Where does 'biweekly' come from?

From the prefix 'bi-', meaning two or twice.
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Shumaila Saeed
Nov 17, 2023

What's the origin of 'fortnightly'?

From Old English, meaning 'fourteen nights'.
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Shumaila Saeed
Nov 17, 2023

Are fortnightly intervals always consistent?

Yes, they strictly mean every two weeks.
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Nov 17, 2023

Can fortnightly be used for payroll?

Yes, for pay periods every two weeks.
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Shumaila Saeed
Nov 17, 2023

Is fortnightly a common term in the US?

It's more common in British English.
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Nov 17, 2023

What does fortnightly mean?

Occurring every two weeks.
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Nov 17, 2023

How does biweekly impact planning?

It requires clear communication to ensure correct understanding.
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Shumaila Saeed
Nov 17, 2023

Why choose fortnightly over biweekly?

For clarity, as it's unambiguous.
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Shumaila Saeed
Nov 17, 2023

Is fortnightly used in financial contexts?

Yes, for payment plans or reporting.
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Shumaila Saeed
Nov 17, 2023

How should biweekly be used to avoid confusion?

With additional context or clarification.
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Nov 17, 2023

How do you differentiate fortnightly and biweekly in use?

By considering the context and regional usage.
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Shumaila Saeed
Nov 17, 2023

What's the best way to state a biweekly occurrence clearly?

Specify if it means twice a week or every two weeks.
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Nov 17, 2023

Is biweekly suitable for scheduling meetings?

It can be, but clarify its meaning.
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Nov 17, 2023

Are fortnightly publications common?

Yes, especially magazines or newsletters.
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Nov 17, 2023

What does biweekly mean in a work context?

It can mean twice a week or every two weeks; context matters.
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Shumaila Saeed
Nov 17, 2023

Can an event be both fortnightly and biweekly?

Yes, if biweekly is interpreted as every two weeks.
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Nov 17, 2023

Are biweekly intervals flexible?

They can be, depending on interpretation.
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Shumaila Saeed
Nov 17, 2023

Do fortnightly and biweekly have different applications?

They can, depending on the clarity needed.
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Nov 17, 2023

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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